CXB3590 build

Hello all,
First time poster here. Long time reader. Been reading the forums for about 6 months now. Finally just went for it and ordered:
10 cxb3590 3000k 72v CB
2. Cxb3590 5000k 72v

6 mean well hlg -120h -c1050

I plan on running 2 per driver.

So here are my noon questions:

I have options for room size ( bloom)
4x4
5x5
6x4

I plan on ordering from Heatsink USA in the next few days. I've done a shit ton of math. I plan on actively with fans. However I want enough sink so that if the fans crap out my lights won't die. Also plan on have temp sensors and light timers hooked to an arduino board so I can view temps outside the room.

Recommended heatsinks?

Cost of electricity is not a problem thats why I plan on driving the cxbs pretty hard.

Ambient temp in the room 21C

I know I have a long way to go but I'm taking my time. Been reading supras posts for a while no, hoping he will chime in here.

Also efficiency rating for the cxbs being drivin at 1050a?

So excited about my new endeavor. Any tips or suggestions are welcome.

Thank you!

This thread has been moved to the led section. Sorry for the repost